Tectonic amalgamation of the Gaoligong shear zone and Lancangjiang shear   zone, southeast of Eastern Himalayan Syntaxis

doi:10.1016/j.jseaes.2014.12.018

CORC > 北京大学 > 地球与空间科学学院

	Tectonic amalgamation of the Gaoligong shear zone and Lancangjiang shear zone, southeast of Eastern Himalayan Syntaxis
	Huang, Xuemeng ; Xu, Zhiqin ; Li, Huaqi ; Cai, Zhihui
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2015
关键词	Shear zone Eastern Himalayan Syntaxis Tectonic amalgamation Boudin model INDIA-ASIA COLLISION POSITIONING SYSTEM MEASUREMENTS LOWER CRUSTAL FLOW LEFT-LATERAL SHEAR WESTERN YUNNAN TIBETAN PLATEAU STRIKE-SLIP AILAO SHAN SE ASIA METAMORPHIC BELT
DOI	10.1016/j.jseaes.2014.12.018
英文摘要	The Gaoligong shear zone (GLGSZ) and Lancangjiang shear zone (LCJSZ) are two major large-scale shear zones southeast of Eastern Himalayan Syntaxis (EHS) and play important roles in the accommodation of the intracontinental deformation in Southeast Asia. The two shear zones, which are mainly composed of high-grade metamorphic rocks and have long been regarded as the Precambrian basement of this area, are gradually merged northward and become tectonically amalgamated from Fugong to Gongshan area. Structural and kinematic analyses reveal that the amalgamation area has experienced strongly partitioned dextral transpression. N-S trending tight to isoclinal folds, sub-vertical foliation and subhorizontal lineation are ubiquitously developed both within the shear zones and the Carboniferous flysch sediments of Baoshan block in between. Micro- and macro-kinematic indicators such as CS structures, rotated porphyroclasts, asymmetric shear folds, sheath folds, domino and boudin structures suggest that the shear sense of the GLGSZ and LCJSZ is dextral in the amalgamation area. Comparative analyses of strata reveal that the Baoshan block is aligned with south Qiangtang block and the Lanping-Simao block was aligned with north Qiangtang block prior to the Cenozoic large scale tectonic extrusion and rotation. The amalgamation area, which has progressively switched positions from northeast of EHS to east and southeast of EHS, is just located at the neck of the large scale boudin of south Qiangtang-Baoshan block. A boudin model is proposed for the tectonic amalgamation of the GLGSZ and LCJSZ from Fugong to Gongshan area in response to the continued northward convergence between Indian plate and Eurasian plate since early Eocene, resistance of South China block, southeastward extrusion and clockwise rotation of Baoshan block around EHS. (C) 2015 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [41302166]; SCI(E); ARTICLE; huangmeng00000@163.com; 64-78; 106
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/418955]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Huang, Xuemeng,Xu, Zhiqin,Li, Huaqi,et al. Tectonic amalgamation of the Gaoligong shear zone and Lancangjiang shear zone, southeast of Eastern Himalayan Syntaxis[J]. JOURNAL OF ASIAN EARTH SCIENCES,2015.
APA	Huang, Xuemeng,Xu, Zhiqin,Li, Huaqi,&Cai, Zhihui.(2015).Tectonic amalgamation of the Gaoligong shear zone and Lancangjiang shear zone, southeast of Eastern Himalayan Syntaxis.JOURNAL OF ASIAN EARTH SCIENCES.
MLA	Huang, Xuemeng,et al."Tectonic amalgamation of the Gaoligong shear zone and Lancangjiang shear zone, southeast of Eastern Himalayan Syntaxis".JOURNAL OF ASIAN EARTH SCIENCES (2015).